This item works together with your car alarm to disengage the starter when you alarm is armed.
This means that your car cannot be hotwired and stolen. Works with any car alarm that has a negative when armed output wire. When you arm your car alarm, the negative wire from your alarm activates this relay to disconnect your starter wire
This is a must have for all car alarms. it will disable your starter when your alarm is armed. After all, what is the point of a car alarm if the thief can still start the car and drive it away. This is the most important component that is most often looked over. You need this!